How did the assassination of archduke francis Ferdinand spark the outbreak of war?
The assassination resulted in Austria-Hungary declaring war on Serbia. There were already existing war plans so this was the match that started the fire so to speak.
The killing of Francis Ferdinand sparks the outbreak of war as there was a declaration of war on Serbia.
The person and his wife Sophia were from Austria and got shot by nationalists when they officially visited the capital of Sarajevo on June 28, 1914.
Therefore, it leads to many series of events that resulted in WWI which was promoted by the military of Europe and its alliances.
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